Civil Engineering MCQAE Level Civil Engineering
In IS 456 (LSM approach), the service load crack width w_cr at the extreme tension fiber is checked against a limiting value. For a member in severe exposure, the limiting crack width is:
RCCServiceability Crack WidthMEDIUM
Choose the correct answer
A
0.1 mm
B
0.2 mm
C
0.3 mm
D
0.4 mm
Correct Answer
B. 0.2 mm
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IS 456 Annex F: Limiting surface crack width — Very severe: 0.1 mm, Severe: 0.2 mm, Moderate/Mild: 0.3 mm. For severe exposure (e.g., coastal), 0.2 mm limit applies.
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